Personally I hate control tyre meetings.
yes it technically means the field is more equal but in reality that's horse poop.
unless its a sponsored events, but Schumacher, DBoots, BB etc, then tyres should be open to your own choice, most would run what works anyway.
I don't like the afore mentioned control by one make or another at events across the country.
Unless its a purely sponsored event then no, control tyres should NOT be used.